论文标题
质子电荷半径来自对空间和时间样区域的实验数据的分散分析
Proton charge radius from a dispersive analysis of the experimental data over the space- and time-like regions
论文作者
论文摘要
我们对覆盖空间和时间样区域的核子的电磁形式因子的实验数据进行了分散理论分析。在整个动量转移范围内，核子形式因子以高精度提取核子半径。使用Bootstrap方法估算了提取的形式因素和半径的统计不确定性，而系统误差是根据光谱函数的变化确定的。对于质子电荷半径，我们发现$ r_e^p = 0.840^{+0.003} _ { - 0.002} {} {}^{+0.002} _ { - 0.002} $ 〜fm，与先前单独的Spacelike数据的分析以及Muonic Lamb移位确定。
We present a dispersion theoretical analysis of the experimental data on the electromagnetic form factors of the nucleon covering both the space- and time-like regions. The nucleon form factors over the full range of momentum transfers and the nucleon radius are extracted with high precision. The statistical uncertainties of the extracted form factors and radius are estimated using the bootstrap method, while systematic errors are determined from variations of the spectral functions. For the proton charge radius, we find $r_E^p = 0.840^{+0.003}_{-0.002}{}^{+0.002}_{-0.002}$~fm, in line with previous analyses of spacelike data alone and also the muonic Lamb shift determination.
